playing a WAV file

README.md

@@ -2,9 +2,21 @@
 
 Les scratchmen utilisent des loopers en Flash 11.
 Il est temps qu'ils découvrent une interface ncurses
-pilotée au joystick :)
+pilotable au joystick ou par OSC :)
 
 ## Prérequis :
 
-libsndfile, libao, libcurses.
+libsndfile, libao, liblo, libcurses.avec les bons -dev !
+
+## Compilation :
+
+Pour le moment, vous êtes laissé à vous-même.
+
+## Hacking :
+
+La voie est libre.
+
+
+
+
 

audio/Makefile

@@ -6,6 +6,11 @@ LIBS    = -lao -lsndfile -lm
 ao_output.o:       ao_output.c Makefile
 	$(CC) ${CCOPT} -c $<
 
-t:	t.c ao_output.o Makefile
+playfile.o:       playfile.c Makefile
-	$(CC) ${CCOPT} $< ao_output.o ${LIBS} -o $@
+	$(CC) ${CCOPT} -c $<
+
+OBJS    = ao_output.o playfile.o
+
+t:	t.c ${OBJS} Makefile
+	$(CC) ${CCOPT} $< ${OBJS} ${LIBS} -o $@
 

audio/ao_output.c

@@ -1,5 +1,5 @@
 /*
- *      NcLooper        fonctions audio
+ *      NcLooper        fonctions audio output
  */
 
 #include  <stdio.h>
@@ -15,13 +15,14 @@
 
 /* --------------------------------------------------------------------- */
 
-static ao_device	*device;	/*  never alone with a singleton */
+extern int		verbosity;
 
 /* --------------------------------------------------------------------- */
-int init_ao_output(int smplrate)
+ao_device *init_ao_output(int smplrate)
 {
 int			default_driver;
 ao_sample_format	format;
+ao_device		*device;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %d )\n", __func__, smplrate);
@@ -43,33 +44,39 @@ format.byte_format = AO_FMT_LITTLE;
 device = ao_open_live(default_driver, &format, NULL);
 if (device == NULL) {
         fprintf(stderr, "Error opening AO device.\n");
-        return -1;
+        return NULL;
         }
 
+#if DEBUG_LEVEL
+fprintf(stderr, "%s : device at %p\n", __func__, device);
+#endif
 
-return 0;
+return device;
 }
 /* --------------------------------------------------------------------- */
-int close_ao_output(void)
+int close_ao_output(ao_device *dev)
 {
 
-ao_close(device);
+if (NULL == dev) {
-ao_shutdown();
+	fprintf(stderr, "%s : no output to close\n", __func__);
+	return -1;
+	}
 
-device = NULL;
+ao_close(dev);
+ao_shutdown();
 
 return 0;
 }
 /* --------------------------------------------------------------------- */
-int play_some_stuff(int notused)
+int play_some_stuff(ao_device *dev, int notused)
 {
 int			i, sample;
 char			*buffer;
 float			freq = 440.0;
 
-#define NB_SAMPLES	44100
+#define NB_SAMPLES	(44100*2)
 
-if (NULL == device) {
+if (NULL == dev) {
 	fprintf(stderr, "%s : please call 'init_ao_output' first\n",
 					__func__);
 	exit(1);
@@ -85,7 +92,13 @@ for (i = 0; i < NB_SAMPLES; i++) {
 	buffer[4*i] = buffer[4*i+2] = sample & 0xff;
 	buffer[4*i+1] = buffer[4*i+3] = (sample >> 8) & 0xff;
 	}
-ao_play(device, buffer, NB_SAMPLES);
+ao_play(dev, buffer, NB_SAMPLES);
+
+free(buffer);
 
 return 0;
-}
+}
+/* --------------------------------------------------------------------- */
+
+/* --------------------------------------------------------------------- */
+

audio/ao_output.h

@@ -1,10 +1,10 @@
 
 /* generic output */
 
-int init_ao_output(int smplrate);
+ao_device * init_ao_output(int smplrate);
-int close_ao_output(void);
+int close_ao_output(ao_device *dev);
 
 
 /* tests functions */
 
-int play_some_stuff(int notused);
+int play_some_stuff(ao_device *dev, int notused);

audio/playfile.c

@@ -0,0 +1,70 @@
+/*
+ *      NcLooper        fonctions audio output
+ */
+
+#include  <stdio.h>
+#include  <unistd.h>
+#include  <string.h>
+#include  <fcntl.h>
+#include  <math.h>
+
+#include <ao/ao.h>
+#include <sndfile.h>
+
+#include  "ao_output.h"
+
+/* --------------------------------------------------------------------- */
+
+extern int			verbosity;
+
+#define		T_BUFF_WAVES	16384
+
+/* --------------------------------------------------------------------- */
+
+int blast_this_file(char *fname, ao_device *dev, int loop)
+{
+SNDFILE                 *sndf;
+SF_INFO                 sfinfo;
+int                     foo, lus;
+short			*buffer;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( '%s' %p %d )\n", __func__, fname, dev, loop);
+#endif
+
+sndf = sf_open(fname, SFM_READ, &sfinfo);
+if (NULL==sndf)
+	{
+	perror("sf_open");
+	abort();
+	}
+
+buffer = calloc(T_BUFF_WAVES, sizeof(short)*2);
+
+#if DEBUG_LEVEL
+fprintf(stderr, "samplerate : %d\n", sfinfo.samplerate);
+fprintf(stderr, "frames     : %ld\n", sfinfo.frames);
+fprintf(stderr, "seekable   : %d\n", sfinfo.seekable);
+#endif
+
+while ((lus = sf_read_short(sndf, buffer, T_BUFF_WAVES))) {
+
+#if DEBUG_LEVEL
+        fprintf(stderr, "%s : %d bytes read\n", fname, lus);
+#endif
+	foo = ao_play(dev, buffer, T_BUFF_WAVES*2);
+#if DEBUG_LEVEL
+        fprintf(stderr, "%s : %d played\n", fname, foo);
+#endif
+
+	}
+
+/* do some cleanup */
+free(buffer);
+sf_close(sndf);
+
+return 0;
+}
+
+
+/* --------------------------------------------------------------------- */

audio/playfile.h

@@ -0,0 +1,3 @@
+
+
+int blast_this_file(char *fname, ao_device *dev, int loop);

audio/t.c

@@ -3,25 +3,37 @@
  */
  
 #include  <stdio.h>
+#include <unistd.h>
+
+#include <ao/ao.h>
 
 #include  "ao_output.h"
+#include  "playfile.h"
 
 /* --------------------------------------------------------------------- */
 
+int			verbosity;
+
 /* --------------------------------------------------------------------- */
 
 int main(int argc, char *argv[])
 {
-int             foo;
+int			foo;
+ao_device		*device;
 
 
-foo = init_ao_output(44100);
+device = init_ao_output(44100);
-fprintf(stderr, "AO init    -> %d\n", foo);
+fprintf(stderr, "AO init    -> %p\n", device);
 
-foo = play_some_stuff(0);
+foo = play_some_stuff(device, 0);
 fprintf(stderr, "play stuff -> %d\n", foo);
 
-foo = close_ao_output();
+sleep(1);
+
+foo = blast_this_file("/home/tth/BU/vrac/1337.wav", device, 0);
+fprintf(stderr, "blast file -> %d\n", foo);
+
+foo = close_ao_output(device);
 fprintf(stderr, "AO close   -> %d\n", foo);